Color correction filter, image display, and liquid crystal display

Abstract

A color correction filter with excellent durability is provided that can remove intermediate colors of light while preventing brightness of an image display from deteriorating and thereby can improve color tone representation of the image display. A color correction filter 10 of the present invention includes a color correction layer 11 and two protective layers 12 . The color correction layer 11 contains a J aggregate of a dye. The dye is at least one dye selected from the group consisting of cyanine, merocyanine, squarylium, and porphyrin. The half bandwidth at a maximum absorption peak of the color correction layer is in the range of 5 to 30 nm. The two protective layers 12 are formed on both surfaces of the color correction layer 11 , respectively.

1 . A color correction filter, comprising a color correction layer and two protective layers,
 wherein the color correction layer contains a J aggregate of a dye,   the dye is at least one dye selected from the group consisting of cyanine, merocyanine, squarylium, and porphyrin,   a half bandwidth at a maximum absorption peak of the color correction layer is in a range of 5 to 30 nm, and   the two protective layers are formed on both surfaces of the color correction layer, respectively.   
     
     
         2 . The color correction filter according to  claim 1 , wherein at least one of the two protective layers is a moisture barrier layer. 
     
     
         3 . The color correction filter according to  claim 1 , wherein at least one of the two protective layers is an oxygen barrier layer. 
     
     
         4 . The color correction filter according to  claim 1 , wherein in the color correction layer the J aggregate of the dye is formed in a matrix resin. 
     
     
         5 . The color correction filter according to  claim 4 , wherein the matrix resin has been crosslinked. 
     
     
         6 . The color correction filter according to  claim 1 , wherein the wavelength of the maximum absorption peak of the color correction layer is in a range of 560 to 610 nm. 
     
     
         7 . The color correction filter according to  claim 1 , wherein the maximum absorbance of the color correction layer in a wavelength range of 560 to 610 nm is at least 0.2. 
     
     
         8 . The color correction filter according to  claim 1 , wherein the dye is cyanine. 
     
     
         9 . The color correction filter according to  claim 8 , wherein the cyanine is represented by at least one formula selected from the group consisting of the following general formulae (1) to (4): 
       
         
           
           
               
               
           
         
         where in general formula (1), Z 11  and Z 12  each are —NH—, —CH 2 —, —CH═CH—, or a heteroatom and optionally have a substituent, and Z 11  and Z 12  are identical to or different from each other, 
         the rings Ar 11  and Ar 12  each optionally have an unsaturated bond in a region other than a condensation portion formed with a nitrogen-containing ring, optionally have aromaticity, optionally have a heteroatom, and further optionally have a substituent, and the rings Ar 11  and Ar 12  are identical to or different from each other, 
         R 11  and R 12  each are a hydrogen atom or a linear or branched alkyl group, the alkyl group is further optionally substituted by an ionic substituent, and R 11  and R 12  are identical to or different from each other, 
         in general formulae (2) to (4), 
         R is a hydrogen atom or a linear or branched alkyl group, and the respective Rs are identical to or different from each other, and 
         in general formulae (1) to (4), 
         R′ is a hydrogen atom, a linear or branched alkyl group, or an aromatic group, and the respective R's are identical to or different from each other, and 
         n is 0 or a positive integer. 
       
     
     
         10 . The color correction filter according to  claim 9 , wherein the cyanine is represented by at least one formula selected from the group consisting of the following structural formulae (5) to (7): 
       
         
           
           
               
               
           
         
         in structural formula (6), 
         R 61  and R 62  each are a hydrogen atom or a linear or branched alkyl group, and R 61  and R 62  are identical to or different from each other, and 
         m and l each are a positive integer and they may be identical to or different from each other. 
       
     
     
         11 . The color correction filter according to  claim 1 , wherein the color correction layer has a thickness in a range of 10 to 500 nm. 
     
     
         12 . An image display, comprising the color correction filter according to  claim 1 . 
     
     
         13 . A liquid crystal display, comprising the color correction filter according to  claim 1 .